const devPresets = ["@vue/babel-preset-app"]; const buildPresets = [ [ "@babel/preset-env", // Config for @babel/preset-env { // Example: Always transpile optional chaining/nullish coalescing // include: [ // /(optional-chaining|nullish-coalescing)/ // ], }, ], ]; module.exports = { presets: process.env.NODE_ENV === "development" ? devPresets : buildPresets, };